News and Articles
Nov 29, 2007
Article
Development of a new high performance PE pressure pipe system, from design phase to reality
Since the introduction of the first systems more than 40 years ago, PE raw material producers and pipe producers have continuously joined their efforts to propose better and better pressure pipe solutions to the end-users and installers. The development of modern installation techniques, in particular trenchless technologies, has created a need for improved systems, with enhanced insensitivity to installation conditions.
more
Nov 28, 2007
News
TT-UK celebrates 25th anniversary: established 1982-2007
In an ever changing technological and economic climate, Bedford based TT-UK and it's hardworking team continue to build on their successes, offering turn-key methods and equipment solutions to Trenchless Technology problems and continued improvements in the method of installing or replacing pipe and cables underground.
more
Nov 26, 2007
News
EPS begins pipeline construction
The first shovel of earth has been turned for the construction of the Ethylene Pipeline South (EPS). The start of excavation in Gaimersheim near Ingolstadt, Germany, marked the beginning of work on the first of 360 kilometers of pipeline in the EPS. Plans call for the pipeline to reach from Münchsmünster in Bavaria across Baden-Württemberg to Ludwigshafen in Rhineland-Palatinate. Once put into service – planned for September 2008 – the pipeline will connect ethylene producers and processors in southeastern Bavaria with the ethylene center in Northwest Europe.
more
Nov 23, 2007
News
NASTT seeks proposals for the development of cured-in-place-pipe (CIPP) publication
The North American Society for Trenchless Technology (NASTT) is accepting proposals to develop a publication on Cured-in-Place-Pipe (CIPP) that complements the Society's existing CIPP Good Practices course. The CIPP publication will be provided to participants of the training courses and will be offered for sale on the NASTT web site.
more
Nov 22, 2007
Article
Application of HFI-pipes for a pipe-in-pipe system in the North Sea
The gas field Forvie North is located in the North Sea between the Shetland Islands and Norway. In this area the water depth is approx. 118 m. The gas reserve itself is located in a depth of approx. 4 km under the seabed. From here the gas is transported with approximately 95 °C. The North Sea is very cold in this area and in order to avoid the establishment of hydrates, the temperature of the transported material must be kept high. Therefore pipe systems with a high thermal insulation have to be used. The heat conduction coefficient may be max. 1 W/m2K. This value can only be achieved by special insulated pipes as a pipe-in-pipe system.
more
Nov 19, 2007
News
New air valve for sewage applications
VAG-Armaturen GmbH (vag-armaturen.com/en/) has extended its product range by an automatic air valve for sewage applications. The VAG FLOWJET Air Valve can serve as both an aeration valve for the draining of sewage water lines and a deairing valve when sewage water lines are filled. It is also suitable for continuous ventilation under system pressure during operation.
more
Nov 16, 2007
News
Borealis and Borouge launch Water for the World
First global programme in plastics industry addressing water crisisLeverages companies’ leadership to provide sustainable solutionsFosters local knowledge and partnerships throughout value chain to reach those in need
more
Nov 15, 2007
News
Interested experts gather for a "virtual exploration trip through underground infrastructures" - UNITRACC receives official award as "Selected Landmark"
On 8 November the on-line training and competence centre UNITRACC was awarded the prize of a "Selected Landmark 2007" by Mr Reinhard Krella, Chairman of the Management Board Private and Business Clients of the Deutsche Bank Eastern Ruhr Area, at the UNITRACC Open Day held in Bochum, Germany. So now UNITRACC officially belongs to the "365 Landmarks in the Land of Ideas" that are awarded by the initiative "Germany - Land of Ideas" and its project partner Deutsche Bank. Bochum's Lord Mayor Dr Ottilie Scholz also took the opportunity to congratulate UNITRACC on the award in person.
more
Nov 14, 2007
Article
Guidelines for the application of pipe bursting
The number of pipelines to be repaired is ever increasing worldwide – e.g. in Germany, important pipeline rehabilitation projects are not carried out due to the devastating financial situation of the municipalities. Although this problem cannot be resolved completely, economical technologies can contribute toward repairing at least the worst damages. In general, it has to be decided whether repair, renovation or pipe renewal (replacement) is required. A pipe replacement is necessary:when repair or renovation is technically or economically inappropriatewhen the hydraulic capacity has to be improved by a greater pipe diameterwhen repair or renovation offers only a short term solution with a pipe replacement being inevitablewhen there is request for a long lasting pipe durability and or a higher product life spanwhen the static loading capacity of the defective pipe would be otherwise negatively affected
more
Nov 14, 2007
Article
Cement Mortar Lining - A method of refurbishment for the long-lasting preservation of the piping infrastructure
Our supply and distribution piping systems have suffered in recent years from a lack of investment. Now the supply utilities see themselves, in addition, exposed to further burdens as a result of increasing demands caused by the deregulation of the market. The consequences: an excessively low rate of reinvestment and the concomitant obsolescence of the existing mains.
more
Nov 12, 2007
News
World premiere for Herrenknecht Direct Pipe: culvert underneath the Rhine River near Worms (Germany) realized in only 13 days.
Herrenknecht has developed a new method called Direct Pipe, which combines the advantages of the established Microtunnelling method and Horizontal Directional Drilling technology. A string of prefab pipes is pulled in with only one step. SONNTAG Baugesellschaft mbH & Co. KG used the new Direct Pipe method to lay a 464m long steel casing for a water pipeline as well as power and telecommunication cables beneath the Rhine River near Worms (Germany). Breakthrough occurred only 13 days after the beginning of the construction work.
more
Nov 08, 2007
News
WEFTEC.07 is the largest event in the conference's 80-year history
Record-setting numbers of 19,929 attendees and 1,017 companies using 268,405 net square feet of floor space have designated WEFTEC.07 – the Water Environment Federation’s 80th Annual Technical Exhibition and Conference – as the largest event in the conference’s 80-year history. The previous exhibition records of 965 companies and 245,155 net square feet of floor space were set at WEFTEC.06 in Dallas and the previous attendance record of 18,704 was set at WEFTEC.02 in Chicago, the host city for next year’s conference.
more
Nov 06, 2007
Article
Giant seals help protect St. Petersburg from flooding
St Petersburg is regarded as Russia’s cultural capital. To protect its people and cultural treasures from flooding, a 25-kilometer storm flood barrier is being constructed. An essential part of this structure are 40 meter-wide, seven meter-high seals, from Trelleborg.
more
Nov 05, 2007
News
New sewers to end flooding misery for Lambeth homes
More than 400 homes and business in Lambeth (England) will be protected from the misery of flooding sewers, under a multi-million pound scheme proposed by Thames water to upgrade the area's sewer network.
more
Oct 30, 2007
News
Grundoburst 1250 G in Warsaw, Poland
In the old historical part of Warsaw in Poland a ND 400 mm clay pipe required replacement over a length of 30m. Inspection of the mains by the Warsaw water and sewerage company showed regular sand on the bottom of the mains, so that it was apparent that the main was fractured and debris was falling to the bottom of the pipe. This presented a permanent problem of road surface subsidence – an imminent danger to the public. The problem could have been confirmed by an internal pipe inspection but this could not take place because the camera simply could not pass through the sand and other debris lying at the bottom of the pipe.
more
Oct 26, 2007
Article
Real 'close fit' rehabilitation of large sewers by GIPP
As published in the September 2007 issue of Trenchless Technology International magazine Nowadays sewer network owners and operators are faced with a huge number of different trenchless methods, materials and suppliers to seal and rehabilitate their pipes. This applies especially for cross sectional pipe dimensions up to approximately 1000mm (40”) I.D.. Above that size the number of approved systems and qualified installers reduces to a comparably small amount.
more
Oct 24, 2007
News
Gotthard Base Tunnel: breakthrough in west tunnel between Sedrun and Amsteg
Squeezing rock conditions successfully overcome
more
Oct 22, 2007
News
Robbins hybrid EPBM a versatile solution for Istanbul sewer
A 3.1 m (10.2 ft) diameter Robbins Hybrid EPBM in Istanbul, Turkey can bore in two very different situations. The hybrid machine can switch between hard rock and EPB modes, making it ideal in mixed ground conditions. The bored tunnel will be used to help clean up a sewer system for over 250,000 people living along Istanbul's Beykoz coastline at the Bosphorus. NTF Construction Company will bore two mixed ground tunnels of 4.1 km (2.5 mi) and 3.0 km (1.9 mi) in length with the hybrid machine.
more
Oct 19, 2007
Article
Helium tracer-gas leak detection - Implemented during the normal operation of the pipeline without interruption of the supply
Leakages occur quite frequently in district heating system, especially in older units. Increasing loss of water and damage to the district heating pipeline network will be a consequence long before the leakage can be noticed on the surface. Locating and repair of such leaks is therefore a difficult task. The repair costs in urban pipeline network systems are determined to a Iarge extent by the necessary excavation work. It is therefore important to accurately determine the Iocation and size of a leak. In co-operation with Fraunhofer Institute, DELU has developed a leak detection method which works without interrupting the supply line.
more
Oct 18, 2007
News
Sea Outfall Saint-Jean-Cap-Ferrat realized under limited space conditions
The modernization of the sewage system of Saint-Jean-Cap-Ferrat (Côte d’Azur) in France included the installation of a 110m long Sea Outfall pipeline. The construction company RPS mastered the narrow access routes, limited space conditions and unstable geology using a mobile Herrenknecht Crawler Rig HK150C.
more
Oct 16, 2007
News
Award winning new sewer sealing gel development
In support of Wessex Water’s Sustainable Sewer Renovation Programme, De Neef UK and Sdi-unistride (in association with Wessex Engineering & Construction Services [WECS]) have announced the latest generation of pipe joint injection sealing gels, SewerSeal JF.
more
Oct 15, 2007
News
Sweeter smell of success
An environmentally friendly project by Southern Water that uses only natural elements like bark, wood chips, seaweed and seashells lining water-filled tanks, is reducing the smell generated by wastewater treatment works.
more
Oct 12, 2007
Article
HSP ? Herrenknecht Separation Plants: separation plants for microtunnelling, pipe jacking and associated applications
In the past, it has been proven time and time again that separation is a vital and sensitive integrative module in the use of tunnel boring machines with hydraulic slurry systems. The separation plant separates the slurry suspension components – solids and liquid – in order to re-provide the slurry circuit with the supporting medium and to make the separated solids disposable. Hydraulic transportation is, however, limited by the concentration of the solids and by grain size. Only an efficient separation can guarantee high performance rates. Insufficient separation obligatorily leads to difficulties regarding the removal of the material from the tunnel face to the separation plant above ground, ensuing downtimes and reduced output.
more
Oct 10, 2007
News
West Ham to benefit from Thames Water’s largest new sewer scheme
Thames Water will soon begin work on its most ambitious new scheme to protect Londoners from repeated sewer flooding. The £64m scheme, which is planned for West Ham, will help protect hundreds of homes and businesses from floods like those seen in July.
more
Oct 08, 2007
News
Northwest Chapter to Celebrate its 10th Annual Trenchless Technology Symposium in Calgary
The NASTT-Northwest (NASTT-NW) Chapter is celebrating the tenth anniversary of its Alberta Trenchless Technology Symposium, Nov. 15, at the Coast Plaza Hotel and Conference Centre in Calgary, Alberta, Canada. The Calgary section of the NASTT-NW Chapter is organizing the event.
more
